To be serious for a moment
Statistically kids to day are no more or less intelligent than kids going back for thousands of years, what has changed is the concept of a "well rounded education".
Modern education, at least in the UK & US, seems to be training to pass exams, not training for life.
Over the last 30 or so years there's been a change in emphasis aimed more to meet targets then to benefit the students.
Not sure what can be done except perhaps to ring fence and inflation link education spending and stop politicians from playing with the education system, maybe force the education minister to send their children or grandchildren to state schools.